Description of pourable silicone moldmaking rubber
pourable silicone moldmaking rubberis generally named
two-components silicone rubber, Part A is a flowable liquid, part B
is the curing agent. It features an exceptional fluidity and good
operability. The mixing ratio is 1:1,mainly be suitable for making
FDA molds application.
Applications of pourable silicone moldmaking rubber
pourable silicone moldmaking rubber could be mainly used for
making concrete stones, precision molds, PU molds, for life
casting, fabric finishing, seal for electronic components and solar
circuit board, trademark decoration. etc.
Instructions for Use pourable silicone moldmaking rubber
It is recommended to homogeneously mix the base compounds before
Select a mixing container 4-5 times larger than the total volume of
material to be mixed.
Weigh out the selected RTV and beta catalyst. Stir for several
minutes scraping the
sides and bottom of the container carefully to produce a
homogeneous mixture. When
using power mixers, avoid excessive speeds, which could entrap
large amounts of air or cause overheating of the mixture,
resulting in shorter pot life.
The air entrapped in the mixing step needs to be removed to
eliminate voids in the cure product. This can be done by
exposing the material to a vacuum of 10-20 mbar. The material
will expand, crest and reduce to about the original level.
Degassing is usually complete about two minutes after frothing
Automatic equipment designed to meter, mix and dispense a
liquid elastomer will add convenience to continuous large scale
After mixing the selected RTV/Beta combination, the material will
cure at room
temperature. Selection of the Beta will determine cure speed, the
work life as well as thedemoulding time.
The system is sensitive to changes in heat and humidity and
therefore variations in cure speed may be seen if one or both
variables are changed.
Operating time (Mins 25°C)
Curing time (Mins 25°C)
120 - 180
Curing time (Mins 60°C)
20 - 30
Density ( g/cm 3 )
Viscosity (CS) (Part A)
30000 ± 5000
Viscosity (CS) (Part B)
5000 ± 500
Viscosity (CS) (After mixed)
10000 ± 2000
Tensile-strength( kgf /cm2 )
80 ± 5
Tear-strength (kgf /cm2 )
7 ± 2
300 ± 50
Handling and Safety Material Safety Data Sheets are available upon
SHELF LIFE: Twelve (12) months from date of shipment when stored at 24°C in
original unopened packages.
PACKAGE: Packed in clean 20kg/pail, 200kg/pail.
Any further informationof RTV2 silicone rubber , please feel free to contact
Mobile:86-189 3886 7585